This module has discussed how higher frequencies are desirable for most applications because it increases efficiency, and wideband gap semiconductor enable higher frequencies. Looking at this chart, it shows power density vs frequency of different materials. For example thyristor has good power density but the frequency is low. The IGBT has a good acceptable power density and frequency but the size might be too big. Now, looking at silicon carbide and gallium nitride the frequencies are high which enable reduced sizes and in result will give higher efficiencies. Now how does KEMET come into play here. As wideband gap semiconductors become more dominant the need for higher frequency capacitors will increase as well. The chart on the right shows film or electrolytic capacitors vs ceramics. As the designer goes higher up in the frequency, ceramic capacitors are more suitable.